1. Practical Applications of Electro-magnetism
© David Hoult 2009

2. Electro-magnetic Relay
© David Hoult 2009

3. © David Hoult 2009

4. © David Hoult 2009

5. © David Hoult 2009

6. © David Hoult 2009

7. © David Hoult 2009

8. © David Hoult 2009

9. Simple Direct Current Motor
© David Hoult 2009

10. © David Hoult 2009

11. © David Hoult 2009

12. © David Hoult 2009

13. The force acting on side a – b will be directed
© David Hoult 2009

14. The force acting on side a – b will be directed downwards so the rotation will be
© David Hoult 2009

15. The force acting on side a – b will be directed downwards so the rotation will be anti-clockwise (viewed from the front of the motor)
© David Hoult 2009

16. Moving Coil Loudspeaker
© David Hoult 2009

17. © David Hoult 2009

18. © David Hoult 2009